Stone dbessing machine



2 Sheets Sheet 1.

J. B. ROSS.

STONE DRESSING MAGHINB.

(No Model.)

No. 315,962. Patented Apr. 14, 1885.

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Patented Apr. 14, 1885.l

INVENTOR WITNESS S UNITED SinfrnsV PATnN'r rrrcn.

JOHhT B. ROSS, OF RAHWAY, NEWT JERSEY.

STONE-DRESSING MACHINE.

SPECIFCATION forming part of Letters Patent No. 315,962, dated April 14, 1885.

Application filed December 1, 1884. (No model.)

To atl whom t may concern,.-

Be it known that I, JOHN B. Ross, of Rah.- way, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Stone- Dressing Machines; and l do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specication.

rlhis invention has relation to a machine for trimming or dressing blocks of stone; and it consists, substantially, in the constructionl and arrangement of parts and in the particular combinations to be hereinafter described, and pointed out in the claims.

The machine was devised more particularly for dressing large blocks of granite, to give to their surfaces either a plain or irregular contour, as may be desired. Other species of stone, however, may be dressed equally as well and in a manner calculated to supersede many machines of a like character heretofore employed.

In constructing a machine in accordance with my present invention a series of springactuated drill-rods are employed which are operated by a corresponding series of spirallyarranged cams, to cause them to descend upon the upper surface of the block of stone successively in regular or uniform strokes, the drill-rods being adjustable in such manner that the depth of incision or hole made by the drills can be regulated precisely to the degree required, thereby enabling a proper determination to be made as regards the thickness required. I also employ suitable mechanism by which the position of the stone itself may be varied or adjusted, so that the descent of the drills may be brought to any and all points ot' the surface of the stone, whereby the dressing is effected in an even and uniform manner throughout, other details being set forth and explained hereinafter, and with reference to the accompanying drawings, in which- Figure 1 represents a perspective view of apparatus constructed in accordance with my invention, and from which the opera-tion will be thoroughly understood. Fig. 2 represents parts.

an end or side elevation in section, to show the construction and arrangement of certain Figs. 3, 4, 5, and 6 represent views in detail, by which a more thorough understanding will be had of the construction of certain parts.

Reference being had thereto by the letters of reference, A A and A A represent, respectively, the two vertical sides of framework in which the machine is mounted, and B the top piece extending across and connect ing the two. The sides of the frame consist of two vertical beams or standards, as shown, having a space between them, in which the crossbeams that bear or sustain the drill-rods are movable or adjustable vertically, as will be explained hereinafter. This main frame may be mounted on a suitable platform, C, and made permanently secure or stationary in any suitable manner. The drill carrying frame consists of an upper and lower crossbeam, D and E, each formed at their ends with a tenon, that enters the space between the uprights A A and A A', respectively, as shown. These beams D and E are maintained relatively apart by curved arms c c and c a', that are secured to them at near each end, as shown, and which together constitute hangers for bearing the cam-shaft, and are separable, as shown, to permit removal of the cam-shaft when desired.

Extending through the top piece, B, near each end, through a screw-threaded opening in each of the tenons formed at the end of the beams D and E, and in the space between the vertical standards comprising the sides of the frame, is a screw rod or shaft, b. These shafts each bear at their upper end a beveled gearwheel, e', that mesh with a beveled gearwheel, d, and a double beveled gear-wheel, d, carried, respectively, at the ends of a horizontal rod or shaft, d, having its bearing in small standards l 2, mounted on the top piece, B, as shown. Secured to and projecting outwardly from the frame at one side are upper and lower brackets, G G', in the one of which a vertical rod or shaft, H, is supported and works, while in the lower one a small shaft carrying a hand-wheel, g, has its bearing, as shown. The vert-ical shaft H carries at its upper end abeveled gear-wheel, t', that meshes with one side of the double beveled gear-wheel cl, while at its lower end it bears a small-pinion, i; meshing with a beveled vcog or gear wheel, -fiz'f'borne `bythe hand-wheel shaft.

It will be evident that byturning the handwheel the parts as connected will operate to guide and raise or lower the drill-carrying frame to any point of adjustment; desired, and the pitch or stroke of the drill accordingly regulated.

M represents a series of drill rods or spindles, arranged at regular intervals apart, and being loosely retained or held in the beams constituting their supporting-frame. These rods have formed with them or shrunk on them a circular lug, m, that in shape approximates to a pear having its enlarged end uppernnost. They are located at such ya point on the rods as to rest upon the vupper surface of the lowerbeam, E, when not in operation.

Each drill-rod carries a spring, n, that bears between the lug m and the under side of the beam D, said springs being compressed when the drills are forced upward by the contact of the cams with the lugs m, their reaction forcing the drills into the stone.

N represents the cam-shaft, that is loosely supported by the hanger a a and a a', having arranged thereon at intervals corresponding to the drill-rods a series of cams, o. These cams are of elliptical contour, and are arranged on the shaft in a spiral manner, so that when the cam-shaft is revolved they will serve to elevate the drill-rods successively, or in a manner similar to a piano-forte action in running the hand across the keys. By this arrangement of the cams the amount of power necessary for their perfect action upon the drills is reduced to a minimum, as but two or three of the rods are elevated in the same fraction of time, and the action thereof being aperfectly continuous one.

O represents a driving-wheel on the end of said shaft, by which the machine may be run from any suitable source of power.

R represents a platform proper, on which the stone to be dressed is carried. The platform consists of an upper and lower section, (indicated, respectively, by the letters r and r,)

' which are formed on their abutting or-contiguous faces or sides with a groove, s, and a track or tongue, s', preferably of a V shape, although other forms may be employed. At about the center of each section a semi-cylindric screwthreaded shell, Z, is formed, (see Fig. 6,) preferably of metal, which is set into the section, which, when the sections are placed together, form a hollow screw-threaded opening. In the opening a screw-rod, Z, is placed, which, when operated to turn by a suitable wrench, causes the upper section to move sidewise, thus enabling the position of the stone to be shifted in that direction, when desired, the said upper section passing outwardly free of the carrying-wheels, the periphery of the latter coming up not quite to the upper surface of the lower section of the platform. The under side of the lower section of the platform has secured to it by bolts or otherwise the axles @which are preferably square, except at their ends or j ournals,where the moving wheels are carried. Secured, also, to the under side of the lower section of the platform, and centrally thereof, is a rack, S, in which meshes and travels a pinion, S', carried byashaft, S, located beneath the platform, where it is maintained in any suitable manner. The said shaft carries at near its outer end a lever, T, bearing a bifurcated pawl, u, loosely pivoted thereto, and also carrying at its end a ratchetwheel, o. By working thelever back and forth on its fulcrum the pawl u takes into the teeth of the ratchet o, and causes the pinion S to work in the rack S, thereby moving the entire platforln forward or backward, as d'e- A sired. The platform may be run on a track from any suitable place where the blocks or Stones are kept, and may terminate at a convenient place beyond the machine,.where the stone may be carried and deposited when iinished. On thelower beam of the drill-carrying frame, to the rear thereof and behind each drill-rod, l have provided independent compound lever devices, by which any one of the drill rods or stocks may be elevated beyond the reach of its operating-cam for any purpose whatever-as, for instance, when it is desired to remove a worn drill-point. This mechanism consists of projecting arms fw, which are bolted or otherwise secured to the outer side of the beam E, and bear at their ends a pivoted or hinge-like bifurcated support, w', in which theV levers a: are pivotally suspended. The lower ends of these levers are bifurcated to embrace the drill lrods or stocks at a point just beneath the pear-shaped lugs m, and the beam E is slotted in its top at these points, so that when the drills are in operation the bifurcated ends of the levers will be accommodated or made flush therewith and not interrupt the proper working of parts. When it is desired to elevate a drill, its lever is depressed, whereupon the drill is thrown upward, the hinged support w being thrown forward on its pivot beyond its center of gravity, and the drill-rod being maintained or held upward until again depressed by the operator. (See Figs. 2 and 4 for a full illustration.) The drill-rods may work in boxing formed in the drill-frame, by which they can be readily removed when desired.

The details of my invention are as follows:

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IIO

The points of the cams o are preferably made l the rods and points being correspondingly formed. In their sides they are provided with an opening communicating With the converging openings, into which a punch or other device is driven when it is desired to remove a drill-point. The cams are beveled at their contact edges, so that in operation the drillrods are caused to partially rotate at each successive stroke, thereby giving to the drill proper a motion similar to that given a drill or chisel during the operation of cutting or boring a stone by hand, this motion being essential to a proper dressing oi' the stone, as otherwise the block would soon become split or cracked.

The operation of my invention Will be fully understood from the foregoing description; but it may be said that With the use of my machine the drill-points can be brought very near to the edges of the stone without splitting the same, and by shifting the stone,so as to remove the rough or irregular portions thereof, the block may be given an even surface preparatory to t-he final polishing by hand or otherwise. rlhe parts can be readily replaced and repaired when Worn, and their construction in many instances varied from that herein represented Without departing from my inventionU Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s r 3 l. In a stone-dressing machine, the combination of astone-carrying platform, constructed of upper and lower sections provided on their abutting or contiguous faces with correspending grooves and tracks, and a screW-shait 3 working in a shell between the sections,where by the upper section may be moved sidewise, substantially as described.

2. The combination, with the beams D E, carrying the spring-actuated drill-rods, and the camshaft bearing the spirally-arranged cams, of the arms c a, connected to the beam D, and the arms a c', connected to the arms a a, and the beam E, for maintaining said beams relatively apart and constituting separable bearings for the cam-shaft, whereby the latter is movable, as set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two Witnesses.

J NO. B. ROSS. XVitnesses:

.l oHN RANDUHOY, GARRATT RUssELL PLA'INER. 

